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Synthesis of macromonomer from radical polymerization of styrene with a polymerizable photoiniferter

✍ Scribed by Shu-Hui Qin; Kun-Yuan Qiu

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 177 KB
Volume: 75
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(20000314)75:11<1350::aid-app5>3.0.co;2-j

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✦ Synopsis

␣-(Methacrylyoxylethyloxycarbonylmethyl)--(N,N-diethyldithiocarbamyl)polystyrene macromonomers with different molecular weights were prepared by radical polymerization of styrene (St) using ␤-methacryloxylethyl 2-N,N-diethyldithiocarbamylacetate (MAEDCA) as a polymerizable photoiniferter in toluene under ultraviolet light. The polymerization of St with MAEDCA carried out by a "living" process; that is, both the yield and the molecular weight of the resultant polymers increased with increasing of reaction time, and the resultant polymer was a macromonomer, for example, ␣-(methacrylyoxylethyloxycarbonylmethyl)--(N,N-diethyldithiocarbamyl)polystyrene, designated as PSt-macromonomer. The molecular weight of the PStmacromonomer depended on the concentrations of the polymerizable photoiniferter and St, as well as the conversion of St. The PSt-macromonomer can copolymerize with MMA initiated by AIBN at 65°C to form a graft copolymer (PMMA-graft-PSt) with PSt branches randomly distributed along the PMMA backbone.

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